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http://dx.doi.org/10.5370/JEET.2014.9.4.1277

Efficiency Improvement for Concentrated Flux IPM Motors for Washing Machines  

Yoon, Keun-Young (Dept. of Mechatronics Engineering, Hanyang University)
Kwon, Byung-Il (Dept. of Electronic Systems Engineering, Hanyang University)
Publication Information
Journal of Electrical Engineering and Technology / v.9, no.4, 2014 , pp. 1277-1282 More about this Journal
Abstract
Concentrated flux interior permanent magnet (CFIPM) motors have the advantage that their utilization of flux linkage is more efficient than that of general IPM motors and CFIPM motors are suitable for washing machine motors, which demand low-speed, high-torque specifications. However, low efficiency occurs in the low-speed high-torque mode considering the high-speed operation for spin mode. This paper proposes a magnet overhang structure between the rotor core that reduces leakage flux and improves efficiency for a CFIPM in wash mode. Optimization of the 3D design of magnet overhang structures is performed to improve the efficiency with the same quantity of permanent magnets. The validity of the optimal design is experimentally verified through the fabrication of prototypes.
Keywords
Concentrated flux; Efficiency; Leakage flux; Magnet overhang; Optimal design;
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